I can’t contribute much here, but I’ll throw something out that may be of interest re mini-nukes. I live in a county that was part of the WPPS (Washington Public Power Supply) debacle, two unfinished nuke plants and one of the largest bond defaults in history. Our local PUD is investigating mini-nukes. Props to them. Story from a local newspaper, yesterday.
PUD Looks at Nuke Partnership

The technology is discussed here, at Nuscale Power’sof
Corvallis, Oregon homepage.